Well if they're holding back kids frequently you gain a second variable that the metric is measuring: age. Are you really testing the reading capability of fourth graders if they are the age of fifth graders due to being held back? That doesn't seem particularly fair as a measure of the quality of education between schools that do and do not hold kids back.
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Well if they're holding back kids frequently you gain a second variable that the metric is measuring: age. Are you really testing the reading capability of fourth graders if they are the age of fifth graders due to being held back? That doesn't seem particularly fair as a measure of the quality of education between schools that do and do not hold kids back.
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